DocumentCode :
1868635
Title :
Adaptive and predictive downlink resource management in next generation CDMA networks
Author :
Wang, Xin ; Ramjee, Ramachandran ; Viswanathan, Harish
Author_Institution :
Dept. of Comput. Sci. & Eng., State Univ. of New York, USA
Volume :
4
fYear :
2004
fDate :
7-11 March 2004
Firstpage :
2754
Abstract :
Guard channels have been proposed to minimize handoff call dropping when mobile hosts move from one cell to another. CDMA systems are power- and interference-limited. Therefore, guard capacity in CDMA networks is soft, that is, a given capacity corresponds to variable number of connections. Thus, it is essential to adjust the guard capacity in response to changes in traffic conditions and user mobility. We propose two schemes for managing downlink CDMA radio resources: guard capacity adaptation based on dropping (GAD), and guard capacity adaptation based on prediction and dropping (GAPD). In both schemes, the guard capacity of a cell is dynamically adjusted so as to maintain the handoff dropping rate at a target level. In the second scheme, there is an additional, frequent adjustment component where guard capacity is adjusted based on soft handoff prediction. We show through extensive simulations that GAD and GAPD control the handoff dropping rate effectively under varying traffic conditions and system parameters. We also find that GAPD is more robust than GAD to temporal traffic variations and changes in control parameters.
Keywords :
cellular radio; code division multiple access; mobility management (mobile radio); radio links; telecommunication channels; telecommunication traffic; adaptive downlink resource management; cellular network; guard capacity; guard capacity adaptation based on dropping; guard capacity adaptation based on prediction and dropping; guard channel; handoff call dropping; handoff dropping rate; next generation CDMA network; predictive downlink resource management; traffic condition; user mobility; Downlink; Interference; Multiaccess communication; Next generation networking; Power system management; Radio spectrum management; Resource management; Robust control; Telecommunication traffic; Traffic control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
INFOCOM 2004. Twenty-third AnnualJoint Conference of the IEEE Computer and Communications Societies
ISSN :
0743-166X
Print_ISBN :
0-7803-8355-9
Type :
conf
DOI :
10.1109/INFCOM.2004.1354693
Filename :
1354693
Link To Document :
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